Chromatic properties of anodised titanium obtained with two techniques

摘要

The aim of the work is to compare the surface properties of titanium oxidised with two different techniques. First technique is the traditional one, using phosphoric acid solution, and the other technique is the one described in [1]. Final potential of the anodisation has been varied from few Volt up to 140 V. Microstructure of the different films show that only the samples anodised with the new technique present an homogeneous microstructure, i.e. all the crystalline grains are coloured, while the traditional technique colours only a part of them. Only having all grains fully coloured it is possible to have at the macroscopic scale saturated and bright colours.